#deadbolt__bolt  the part of a lock that is engaged or withdrawn with a key
  supertype:  bar.artifact  a rigid piece of metal or wood; usually used as a fastening or obstruction of weapon; "there were bars in the windows to prevent escape"
  part of:  lock.holdfast
  subtype:  safety_bolt__safety_lock  a bolt that cannot be moved from outside the door or gate

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